JP3940040B2 - Bush-shaped unit mount - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bush-shaped unit mount having an outer ring, an inner support member, and a rubber spring disposed therebetween.
[0002]
In the known unit mount of this type, the rubber spring is vulcanized in an intermediate space between the outer ring and the support member. In such a configuration, when the mount is cooled following vulcanization, the rubber spring contracts, and this contraction expands an intermediate space, which may result in failure to obtain desired mount characteristics.
[0003]
[Prior art]
It is known from DE 3840176C2 that, in order to eliminate the above drawbacks, it is known that an additional body is inserted into the intermediate space thus expanded, that is, an expanded gap, and an elastic initial stress is obtained by this additional body. With this configuration, it is possible to use the nonlinear characteristics in the tension direction of the mount from an early stage. By calibrating and adjusting, the unit mount can be configured and used without providing an additional body to the unit mount. However, the calibration must eliminate the gap entirely or at least partially. This is a problem when the gap has reached a large dimension of, for example, a maximum of 4 mm. In this case, the gap size comes from two factors, one of which is due to the shrinkage due to vulcanization already mentioned, resulting in a gap of up to 2 mm. The other is due to the manufacturing technique and is the minimum dimension required to provide an axial penetration in the rubber spring. Adjustment is particularly difficult when the outer ring is provided with a contoured elastomeric coating.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a unit mount that can be manufactured at low cost and can avoid the disadvantages caused by the contraction of a rubber spring.
[0005]
According to the invention, in the unit mount of the type mentioned at the outset, the outer ring is provided with a notch at least in the connection region of the rubber spring, the notch being an outer contour of the outer ring. This is solved by providing an end bulge projecting radially outward from and extending axially over the length of the notch . This new design preferably uses an outer ring coated with an elastomer, thereby eliminating the relatively expensive corrosion protection required when forming an outer ring from a metal ring not coated with an elastomer. It becomes. Unitary mount of the present invention, when used, is incorporated in the hold portion, the holding portion end elevations this time is connected in the connection area. By adopting an end bulge projecting in the radial direction, costly adjustments can be omitted. By incorporating the unit mounts in the corresponding holding parts, the end ridges are pushed radially inward through the notches in the outer ring, thereby canceling the dimensional reduction due to the contraction of the rubber springs. Or even the initial stress of the rubber spring. For this purpose, the height difference between the end ridge and the outer contour of the outer ring, or the difference in radial position between the top of the end ridge and the outer contour of the outer ring, the radial spacing. Is set so as to substantially correspond to the shrinkage amount of the rubber spring caused by vulcanization or to be larger than the shrinkage amount of the dimension. In other words, the idea of the present invention is that after the end raised portion is inserted into the notch portion of the outer ring and the unit mount is inserted into the holding portion, the end raised portion passes through the notch portion radially inward. It is intended to constitute at least one rubber spring of the unit mount so that it is pressed and thereby offsets at least the contracted dimension. If the end ridges have a corresponding configuration and height, it is even possible to bring an initial stress to the rubber spring by press-fitting, which is preferred in a range of applications.
[0006]
By developing the idea of the present invention, in a unit mount of the type mentioned at the outset, according to the present invention, an elastomeric coating is provided around the outer ring, the outer ring being connected between the outer ring and the inner support member. One or more areas of the free space resulting from the production between them are provided with a number of notches corresponding to the number of these areas, the outer ring elastomeric coating being in these areas, In the state in which the unit mount is incorporated in the holding portion, it has a thick portion that fills at least a free space resulting from the manufacture between the outer ring and the inner support member and extends in the axial direction over the length of the notch portion. . With this configuration , it is possible to attach the stopper to the side opposite to the rubber spring with respect to the internal support member . The stopper in this case is separated from the rubber spring. By incorporating this unit mount into the holding part, as a result, the thick part is pressed into the notch part of the outer ring in the radial direction, so that free space, passages or gaps resulting from manufacturing, and shrinkage The resulting enlarged separation gap can be bridged, i.e. the gap can be eliminated. With this configuration, the stopper contacts the internal support member .
[0008]
An additional notch in the wall of the outer ring located laterally offset from the main load direction, in order to place an additional restriction transversely to the main direction of operation for free deflection of the inner support member Parts are provided. This additional notch does not open facing the main load direction. The additional notch is covered with an elastomer-covered bulge, and this bulge is press-fitted into the outer ring radially inward with the unit mount mounted in the holding part. . Such a bulging portion substantially corresponds to the above-described thick portion in terms of its shape, and can similarly be press-fitted into the unit mount in the radial direction through the notch portion in the outer ring. With this configuration, the stopper appropriately configured to form an angle with respect to the main load direction or to be orthogonal to the main load direction can function at an early stage or while the deviation is small.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be further described with reference to a plurality of embodiments shown in the drawings.
[0010]
FIG. 1 shows a cross section in a direction perpendicular to the axis, that is, a transverse cross section, in a state where the unit mount 1 configured in a bush shape is not incorporated in the holding portion. FIG. 1 shows a cross section taken along line BB of FIG. The unit mount is formed of an outer ring 2 having a substantially elastomeric coating 3, an inner support member 4 and rubber springs 5 and 6 provided therebetween. The force acting on the unit mount 1 during operation is indicated by an arrow 7 representing the main load direction. In the connection areas 8 and 9 of the rubber springs 5 and 6, notches 10 and 11 of the outer ring 2 are provided. The end ridges 12 and 13 of the rubber springs 5 and 6 pass through these notches 10 and 11 and project radially outward from the outer contour of the outer ring formed of the elastomer coating 3. When the unit mount 1 is incorporated into the holding portion, the end raised portions are connected to the holding portions in the connection regions 8 and 9, and the end raised portions are pressed radially inward by the holding portions. The height difference between the end ridges and the outer contour of the outer ring 2 or the radial distance X is set to be at least as large as the size of the rubber springs 5 and 6 contracted by vulcanization. Yes. If the end ridges 12 and 13 correspond in height to the shrinking dimensions of the rubber springs 5 and 6, the end ridges are notched in the outer ring due to the contraction of the rubber springs 5 and 6. Substantially pulled into parts 10 and 11. However, it is preferable to set the height difference or distance X to be larger so that the initial stress is already applied to the rubber springs 5 and 6 when the unit mount 1 is assembled in the corresponding holding part. In this embodiment, the protrusion 24 extending in the direction of the mount axis is formed so that the elastomer coating 3 provided on the outer ring 2 forms a corrugation in a cross section perpendicular to the mount axis around the outer ring. Forming.
[0011]
FIG. 2 shows a cross section of the unit mount of FIG. 1 parallel to the mount axis and perpendicular to the main load direction, that is, a vertical cross section. FIG. 2 shows a cross section taken along the line AA of FIG. This figure shows that the rubber springs 5 and 6 extend in the direction of the axis of the mount, and the end ridges that incline so as to increase in thickness towards the left side of the drawings indicated by reference numerals 14 and 15. The arrangement of the slope-like configuration of the parts 12 and 13 is shown and this configuration facilitates the incorporation of the unit mount 1 into the holding part.
[0012]
FIG. 3 shows a cross section of the unit mount 1 that functions in the main load direction 7. The tension stopper 16 is formed in a stub shape in this embodiment. FIG. 3 shows a cross section taken along line DD of FIG. The spring force is mainly provided by rubber springs 18 and 19 which are here configured in a generally V-shape when viewed in cross section. A pressing stopper buffer 20 is inserted between the rubber springs 18 and 19. In the region 21, the outer ring 2 is provided with a notch 22 that opens facing the main load direction 7. The cutout portion 22 is covered with a thick portion 23 integrated with the outer ring 2. The rubber springs 18 and 19 are directly attached to the outer ring 2, and the outer ring 2 is not provided with a notch 22 in this region. When the unit mount 1 is assembled in a holding part (not shown), the thick part 23 is connected to the holding part in the region or the connection region 21, and the thick part 23 is inserted into the notch 22 by the holding part. It is pressed inward in the direction and comes into contact with the outer surface of the stopper 16 located in the radial direction. With such a configuration, by incorporating a unit mount in the holding portion, the shrinkage of the size caused by the shrinkage of the rubber springs 18 and 19 and the free space created by the existing through-hole 17 in the axial direction are bridged to each other. In other words, the inner surface of the thick portion 23 and the outer surface of the stopper 16 can be brought into contact with each other. In this embodiment, the protrusion 24 extending in the direction of the mount axis is formed so that the elastomer coating 3 provided on the outer ring 2 forms a corrugation in a cross section perpendicular to the mount axis around the outer ring. Forming.
[0013]
FIG. 4 shows a longitudinal section of the unit mount of FIG. 3 and shows the configuration of the mount 1 having a through portion or a free space 17 extending in the axial direction of the mount. FIG. 4 shows a cross section taken along line CC of FIG. The stopper 16 is separated from the thick portion 23 by the axial through portion 17. Nevertheless, in order to utilize the non-linear characteristics from an early point in the direction of pulling the rubber springs 18 and 19, that is, in the tension direction, the unit mount 1 is pushed inward when the holder is incorporated. A thick portion 23 whose inner surface abuts against the stopper 16 is provided. In this embodiment, the rubber springs 18 and 19 extend over the entire axial length of the unit mount 1. In order to obtain the desired non-linear characteristic and characteristic transition, it is sufficient that the thick part 23 cooperating with the stopper 16 extends over the length of the notch part 21.
[0014]
FIG. 5 is a plan view showing only the main part of the unit mount 1 of FIGS. 3 and 4 and shows the shapes of the thick part 23 and the notch part 22. Also clearly shown are the raised portions or protrusions 24 of the elastomeric coating 3 of the outer ring 2 that are corrugated in cross section. The thick part 23 covers the notch part 22 with an inclination so that the thickness becomes thinner upward as viewed in the drawing. With this configuration, the unit mount 1 can be easily inserted into the holding portion.
[0015]
6 and 7 show a transverse section and a longitudinal section in a state in which the unit mount 1 shown in FIG. 6 shows a cross section taken along line FF in FIG. 7, and FIG. 7 shows a cross section taken along line EE in FIG. The thick part 23 is pressed through the notch 22 and is in contact with the stopper 16.
[0016]
8 and 9 show an embodiment for limiting the free deflection of the internal support member caused by the drilling of the through-holes 17 extending in the axial direction of the mount. Here, FIG. 8 shows a completed state of the unit mount 1 itself, and FIG. 9 shows a state in which the unit mount 1 is assembled in the holding portion 25. The configurations of the rubber springs 18 and 19 and the configurations of the outer ring 2 and the inner support member 4 include the configurations shown in FIGS. 3 to 7, including the configuration of the thick portion 23 and the notch portion 22 in the outer ring 2. It is the same. In this embodiment, additional notches 26 and 27 are provided on the wall of the outer ring 2 that is located laterally offset from the center line along the main load direction 7. As well shown in FIG. 8, the additional notches 26 and 27 open in a direction perpendicular to the main load direction 7. These additional notches are covered by the bulges 28 and 29 of the elastomer coating 3, which bulges 28 and 29 hold the unit mount 1 as shown in FIG. In the state of being incorporated in the inner ring 25, like the thick portion 23, it is press-fitted into the outer ring 2 inward. The internal support member 4 has side stoppers 30 and 31, and in the assembled state, the bulging portions 28 and 29 abut against these side stoppers 30 and 31. With this configuration, it is possible to add an additional restriction to the unit mount 1 for free lateral displacement. In this example, as well shown in FIG. 8, the mounting of the mount is such that the elastomeric coating provided on the outer ring 2 forms a corrugation in a cross section perpendicular to the axis of the mount around the outer ring. A protrusion 24 extending in the axial direction is formed.
[0017]
FIG. 10 shows a cross section of yet another embodiment of the unitary mount 1. The notches 35 and 36 are here provided in the connection area of the rubber springs 35 and 36 in the lower half of the outer ring 2. The notches 35 and 36 are engaged with spring legs 37 and 38 each having a substantially V-shaped rubber spring. End ridges 39 and 40 of the rubber springs or spring legs 37 and 38 project radially outward from the outer contour of the outer ring 2. By incorporating the unit mount 1 into a holding portion (not shown), the end raised portions 39 and 40 are connected to the holding portion, and the end raised portion 39 is press-fitted through the notches 35 and 36 by the holding portion. And 40, the inner support member 4 is biased upward, and abuts and presses against the stopper 41 protruding inward. The space and space between the internal support member 4 and the stopper 41 correspond to the axial penetration portion 17 resulting from the manufacture and the contraction amount of the dimension caused by cooling when the unit mount 1 is manufactured. Such a configuration of the unit mount 1 provides the same effect as the unit mount described with reference to FIG. 3, but in this embodiment, the stopper 41 is provided inside the outer ring 2. This is different from the case of FIG. In the case of FIG. 10, with respect to contact with the stopper 41 deviate the inner support member 4 by the end ridges 39 and 40 is pressed, in the case of Figure 3, the thick portion 23 is They are different in that they are pressed and immediately come into contact with the stopper 16. In this embodiment, the elastomer coating provided on the outer ring 2 forms a protrusion 24 extending in the direction of the mount axis so as to form a corrugation in a cross section perpendicular to the mount axis around the outer ring. is doing.
[0018]
The idea of the present invention can also be applied to a unit mount in which the outer ring is not provided with an elastomer coating when, for example, corrosion prevention or tolerance correction is not required.
[0019]
【The invention's effect】
The present invention is a bush-shaped unit mount (1) comprising an outer ring (2), an inner support member (4), and rubber springs (5, 6) disposed therebetween. The outer ring (2) is provided with a notch (10, 11), which opens at least in the connection region (8, 9) of the rubber spring (5, 6), preferably facing the main load direction, The notches (10, 11) are characterized in that they have end ridges (12, 13) protruding from the outer contour of the outer ring (2). This arrangement provides a unit mount that can be manufactured at low cost and avoids the disadvantages caused by the contraction of the rubber spring.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a unit mount for symmetrical tensile / compressive loads.
FIG. 2 is a longitudinal sectional view of the unit mount taken along the line AA in FIG.
FIG. 3 is a cross-sectional view showing a unit mount having a large working path in the radial direction.
4 is a longitudinal sectional view of the unit mount taken along the line CC of FIG. 3. FIG.
FIG. 5 is a plan view of the unit mount of FIG. 3;
6 is a cross-sectional view showing the unit mount of FIG. 3 incorporated in a holding portion.
7 is a longitudinal sectional view of the unit mount taken along the line EE in FIG. 6. FIG.
FIG. 8 is a cross-sectional view of a unit mount that additionally restricts free deflection in the lateral direction.
9 is a view showing a state in which the unit mount of FIG. 8 is incorporated in a holding unit.
FIG. 10 is a cross-sectional view showing another embodiment of a unit mount.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Unit type mount 2 Outer ring 3 Elastomer coating | cover 4 Support member 5 Rubber spring 6 Rubber spring 7 Main load direction 8 Connection area 9 Connection area 10 Notch 11 Notch 12 End ridge 13 End ridge X Difference in height 17 Free space 18, 19 Rubber spring 21 Region 22 facing the main load direction Notch portion 23 Thick portion
25 Holding part 26, 27 Additional notch part 28, 29 Swelling part
35, 36 notch
37, 38 spring legs
39, 40 end ridges
41 stopper

Claims (6)

A bush-shaped unit mount (1) comprising an outer ring (2), an inner support member (4), and rubber springs (5, 6) disposed therebetween,
The outer ring (2) includes notches (10, 11) at least in the connection regions (8, 9) of the rubber springs (5, 6), and the notches (10, 11) Projecting from the outer contour of the ring (2) and having an end ridge (12, 13) extending axially over the length of the notch (10, 11), the unit mount is incorporated into the holding part In such a state, the end bulge is pressed radially inward through the notch, thereby canceling the dimensional reduction due to the shrinkage of the rubber spring caused by vulcanization. Expression mount. The difference in height (X) between the end raised portion and the outer contour of the outer ring (2) corresponds to the reduction in size due to contraction of the rubber spring (5, 6) due to vulcanization. The unit mount according to claim 1. The height difference (X) between the end raised portion and the outer contour of the outer ring (2) is larger than a reduction in size due to shrinkage of the rubber spring (5, 6) due to vulcanization. The unit mount according to 1. A unit mount according to any one of the preceding claims, wherein an elastomeric coating (3) is provided around the outer ring (2). An outer ring (2), an inner support member (4), and a rubber spring ( 18 , 19 A bush-shaped unit mount (1) comprising:
An elastomeric coating (3) is provided around the outer ring (2);
The area where the outer ring (2) faces one or more main load directions (7) of free space resulting from the manufacture between the outer ring (2) and the inner support member (4) ( twenty one ) To these areas ( twenty one ) Number of cutouts corresponding to the number of twenty two ) And the elastomeric coating (3) of the outer ring (2) twenty one ) In the state in which the unit mount (1) is incorporated in the holding portion, a free space (due to manufacture between the outer ring (2) and the inner support member (4)) ( 17 ) And at least the notch ( twenty two ) Wall thickness part extending in the axial direction over the length of twenty three ) Unit mount. An additional notch (on the wall of the outer ring (2) located laterally away from the main load direction (7) ( 26 , 27 ) And this additional notch ( 26 , 27 ) Is a bulging portion (3) of the elastomer coating (3). 28 , 29 In the state where the unit mount (1) is incorporated in the holding portion, the bulging portion ( 28 , 29 6. The unit mount according to claim 5, wherein the inner support member (4) is free-biased by being pressed into the outer ring radially inward.

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